JPH11233968A - Chassis and plasma display device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chassis exhibiting sufficient heat radiation, particularly a chassis which can be suitably used in combination with a plasma display panel (PDP), and a plasma display device provided with the chassis. SOLUTION: The aluminum plate 2 and the aluminum plate 2
A radiating fin 5 brazed and provided above,
The above problem has been solved by the chassis 1 in which the hollow portion 6 is formed between the radiation fins or between the radiation fin and the aluminum plate. In particular, it is used as a chassis disposed between a PDP having a glass substrate and a transparent electrode and a drive circuit for displaying image information on the PDP.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis installed in an apparatus having a heat-generating portion, and more particularly, to a chassis suitable for a wall-mounted television using a plasma display panel (hereinafter referred to as "PDP"). TECHNICAL FIELD The present invention relates to a heat-radiating chassis used for a semiconductor device and a plasma display device including the same.

[0002]

2. Description of the Related Art Various types of chassis have been developed for a chassis installed in a device having a heat-generating portion depending on the application and purpose.

On the other hand, a PDP having a display capacity suitable for each purpose of use can be obtained. Except for the effective display portion, the display is small and requires no installation space, and the display has fluctuation, flicker, blur, distortion, The display quality represented by brightness, contrast, and the like is excellent, and practical application to various image display devices has been attempted.

[0004] On the back side of the PDP, there is provided a chassis for supporting the PDP and arranging a drive circuit for operating the PDP.

Conventionally, this chassis has a thickness of 2-3 mm.
In general, a single aluminum plate is reinforced with a reinforcing material, and a hole for mounting a drive circuit board is provided.

[0006]

A conventional chassis in which aluminum veneer is reinforced with a reinforcing material does not consider heat generated in the PDP and the drive circuit when displaying image information on the PDP. There is also a problem that heat dissipation is not sufficient.

An object of the present invention is to provide a chassis exhibiting sufficient heat radiation, particularly a chassis which can be suitably used in combination with a PDP, and a plasma display device having the same.

[0008]

According to another aspect of the present invention, there is provided a chassis including an aluminum plate and heat radiation fins brazed on the aluminum plate. Alternatively, a hollow portion is formed between the radiation fin and the aluminum plate.

Preferably, the radiating fins have a U-shape or a continuous waveform, and a hollow portion formed between the U-shaped radiating fins or between the corrugated radiating fin and the aluminum plate, Good ventilation and improved heat dissipation.

It is preferable that a brazing sheet is provided on the aluminum plate, and the radiating fins are brazed on the aluminum plate by the brazing sheet.

It is preferable that an auxiliary chassis is provided on the heat radiation fin so as to face the aluminum plate, and a predetermined portion of the aluminum plate or the auxiliary chassis is cut out as necessary to reduce the weight. Chassis may be used.

According to the present invention, sufficient heat radiation can be performed by the heat radiation fins brazed to the aluminum plate, and since the heat radiation fins are provided so as to form the hollow portion, the ventilation is good. Easy to radiate heat. Furthermore, sufficient heat can be radiated even when high heat is generated when the brightness of the plasma display is increased.

[0013]

Next, the present invention will be described with reference to the drawings.

FIG. 1 shows a chassis 1 using U-shaped radiating fins 5 and FIG. 2 shows a chassis 1 using corrugated fins 8.
Are respectively shown. The chassis 1 has an aluminum plate 2 and radiation fins 5 and 8 brazed on the aluminum plate 2. A hollow portion 6 is formed between the radiation fins or between the radiation fin and the aluminum plate 2. Is formed. Preferably, a brazing sheet 3 is provided on the aluminum plate 2.
The heat radiation fins 5 and 8 are provided on the aluminum plate 2 by brazing. In addition, the radiation fins 5 and 8
Are preferably provided in alignment on the aluminum plate 2, and an auxiliary chassis 7 is preferably provided on the radiating fins 5 and 8 so as to face the aluminum plate 2. The chassis 1 is usually mounted in an apparatus having a portion that generates heat (hereinafter, referred to as a “heat generating member”).

The aluminum plate 2 only needs to be able to contact the heat-generating member and conduct its heat to the radiating fins 5 and 8, and the material and thickness thereof are not particularly limited. It can be appropriately selected in consideration of the strength and the like.

A brazing sheet 3 is preferably provided on the aluminum plate 2. Brazing sheet 3
The heat radiation fins are provided for joining to the aluminum plate 2, and the material is appropriately selected depending on the materials of the aluminum plate and the heat radiation fins, and a material that can be brazed well is used. Also, the thickness is appropriately selected according to the required brazing strength between the radiation fin and the aluminum plate.

The heat radiating fins are provided to effectively radiate heat from the heat generating member that contacts the aluminum plate 2 or the auxiliary chassis 7. As the shape of the radiation fin, a U-shaped fin 5 or a fin 8 having a continuous waveform can be preferably used, but other fins, for example, a waveform having a rectangular shape or a curve such as a sine wave may be used. There is no particular limitation. These fins not only enhance the heat dissipation, but also have the function of preventing the chassis 1 from being deformed.

The radiation fins 5 and 8 are brazed onto the aluminum plate 2 with a brazing material such as a brazing sheet 3. At this time, it is preferable to arrange them on the aluminum plate 2. By brazing the radiation fins, hollow portions 6 are formed between the radiation fins. Each of the hollow portions 6 is open in the same direction because the radiation fins are arranged in a line. Therefore, for example, it serves as a wind passage provided in a television receiver using a PDP, and has an action or function of further improving the heat dissipation of the chassis 1.

Further, the effect of the heat radiation can be enhanced by the surface area of the heat radiating portion. It is preferable that a shape such as a projection is further added to the structure.

Therefore, in the design stage, by appropriately setting the shape, arrangement, installation intervals, and the like of the radiating fins of the chassis 1, for example, when displaying image information on a PDP, the heat generated by the PDP and the driving circuit is reduced. Heat dissipation can be made sufficient. The material and thickness of the heat radiation fins can be appropriately selected in consideration of strength, heat radiation, and the like.

The auxiliary chassis 7 is provided on the radiating fin so as to face the aluminum plate 2 and serves as a mounting plate for a heat generating member.
A heat-generating member can be in contact with the upper portion to dissipate the heat. The auxiliary chassis 7 and the radiation fins are usually formed by the above-described vacuum brazing method, but may be connected by another brazing method or rivets or screws. When joining by the vacuum brazing method, the auxiliary chassis 7
It is preferable to provide a brazing material such as a brazing sheet and brazing. The auxiliary chassis 7 may be a predetermined portion cut out, and such an auxiliary chassis 7 is preferably used because the chassis 1 can be reduced in weight. Note that a predetermined portion of the aluminum plate 2 may be cut out to reduce the weight, as long as the strength can be maintained. The material and thickness of the auxiliary chassis 7 are appropriately selected in consideration of strength, heat dissipation, and the like, and are not particularly limited.

FIG. 3 is a front view showing an embodiment of the chassis 1 constituted by the U-shaped radiating fins 5 of FIG.
The chassis 1 includes an aluminum plate 2, an auxiliary chassis 7 from which a predetermined portion is cut out, and a U-shaped heat dissipating fin 5 arranged between them.

FIG. 4 is an explanatory diagram showing an example of the chassis 1 shown in FIG. 3, a PDP, and a relationship between the PDP and its driving circuit. The PDP 20 is disposed on one side of the chassis 1, preferably on the side of the aluminum plate 2, and on the other side,
Preferably, a drive circuit 30 is provided on the auxiliary chassis 7 side. At this time, the PDP 20 is adhered on the aluminum plate 2 of the chassis 1 with a double-sided tape.

In FIG. 3, the auxiliary chassis 7 can be provided with a fixing pin 11 for disposing a heating section such as a drive circuit. In place of the fixing pin 11, for example, a hole for riveting, a female screw, a spacer, or the like may be appropriately provided.

FIG. 5 shows a PDP driving circuit 3
This is an example in which 0 is provided. Auxiliary chassis 7 of chassis 1
A fixing pin 11 is provided on the upper side, and a drive circuit 30 is provided so as to bridge over the fixing pin 11. The drive circuit 30 is attached by providing the drive circuit 30 on an aluminum plate 31 and screwing the aluminum plate 31 to the fixing pins 11 or the like. Further, it can be performed by directly screwing the aluminum plate 31 to the chassis 1.

The chassis 1 is usually mounted in a device provided with a heat generating member. In particular, as a component of a wall-mounted television using a PDP, as shown in FIG.
And a drive circuit 30 for displaying image information on the PDP 20. This chassis 1
Is preferably used because it has sufficient heat dissipation even with respect to an increase in heat generation by increasing the brightness of the plasma display. Also, the radiation fins are arranged in line,
Since the hollow portion 6 is formed, ventilation is good, and heat is more easily radiated, so that a plasma display device having excellent heat dissipation can be obtained. Further, it is possible to obtain a plasma display device in which the number of ventilation fans for lowering the temperature of the PDP is reduced, or a plasma display device which does not require a ventilation fan. Further, since the temperature of the PDP during operation can be lowered, it is possible to improve the display quality such as increasing the brightness of the PDP and extend the life.

[0027]

As described above, according to the chassis of the present invention, since the heat radiation fins are provided on the aluminum plate 2 by a simple method such as vacuum brazing, the surface area is large and the heat radiation is excellent. The chassis can be easily obtained. Further, since the hollow portion 6 is formed between the heat radiation fins or between the heat radiation fin and the aluminum plate 2, ventilation is good, and heat radiation can be further improved by blowing air.

Further, by appropriately selecting the cutting dimensions and the arrangement of the heat radiation fins, it is possible to extremely easily form the chassis 1 corresponding to a desired size, for example, a PDP size. Further, there is an excellent effect that the heat dissipation can be sufficiently considered from the design stage, and the chassis can be reduced in weight and strength.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a chassis of the present invention using U-shaped fins.

FIG. 2 is a plan view showing an example of a chassis of the present invention using a corrugated fin.

FIG. 3 is a front view showing an example of the chassis of the present invention.

FIG. 4 is an explanatory diagram showing a relationship among a chassis, a plasma display panel (PDP), and a driving circuit according to the present invention.

FIG. 5 is a plan view showing an example in which a drive circuit is provided on the chassis of the present invention.

[Explanation of symbols]

 Reference Signs List 1 chassis 2 aluminum plate 3 brazing sheet 5 U-shaped heat radiation fin 6 hollow portion 7 auxiliary chassis 8 corrugated heat radiation fin 10 cutout portion 11 fixing pin 20 plasma display panel (PDP) 30 drive circuit 31 aluminum plate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihide Imamura 2-3-3 Shiba, Minato-ku, Tokyo Inside MFA FabTech Co., Ltd.

Claims (6)

[Claims] 1. An aluminum plate and a radiation fin brazed on the aluminum plate, and a hollow portion is formed between the radiation fins or between the radiation fin and the aluminum plate. Chassis. 2. The chassis according to claim 1, wherein the radiating fins are U-shaped, and a hollow portion is formed between the U-shaped radiating fins. 3. The chassis according to claim 1, wherein the radiation fin has a continuous waveform, and a hollow portion is formed between the radiation fin having the waveform and the aluminum plate. 4. The chassis according to claim 1, wherein a brazing sheet is provided on the aluminum plate, and the radiating fins are brazed on the aluminum plate by the brazing sheet. . 5. The chassis according to claim 1, wherein an auxiliary chassis is provided on the heat radiation fins so as to face the aluminum plate. 6. A plasma display device comprising the chassis according to claim 1 provided on the back side of a plasma display panel.